相关疑难解决方法(0)

我需要替换Fragment一个Activity与另一个Fragment,下面是层文件Activity:

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:id="@+id/home_layout_container">

    <fragment android:name="com.foo.FragA"
        android:id="@+id/home_list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

    </FrameLayout>

所以默认情况下有FragA,现在我想在活动中用FragB替换它,我做了:

public void onRegionClicked(Region region) {
    RegionInfoFragment rif = RegionInfoFragment.newInstance(region);
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.replace(R.id.home_list, rif);
}

但我得到了例外:

>6:24:40.685: ERROR/AndroidRuntime(9194): Uncaught handler: thread main exiting due to uncaught exception
05-06 16:24:40.692: ERROR/AndroidRuntime(9194): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
05-06 16:24:40.692: ERROR/AndroidRuntime(9194): …

我正在创建一个包含一个片段的三个选项卡,现在我想用同一个选项卡中的新片段替换第一个Tab的片段.如何保持标签保持不变？

我的代码 -

Tab_Widget.java

    public class Tab_Widget extends TabActivity {

            TabHost tabHost; 

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.tab_host);

            tabHost = getTabHost();

            tabHost.addTab(tabHost.newTabSpec("Tab1")
                .setIndicator("Tab1")
                .setContent(new Intent().setClass(this, main_activity.class)));

            tabHost.addTab(tabHost.newTabSpec("Tab2")
                .setIndicator("Tab2")
                .setContent(new Intent().setClass(this, second_activity.class)));

            tabHost.addTab(tabHost.newTabSpec("Tab3")
                    .setIndicator("Tab3")
                    .setContent(new Intent().setClass(this, third_activity.class)));

            tabHost.setCurrentTab(0);
        }
     }

main_activity.java

public class main_activity extends FragmentActivity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mainfragment);
    }
}

main_fragment.java

public class main_fragment extends Fragment
{
    LinearLayout mLayout;
    Button mButton;
    @Override
    public …

我知道SO有关问题的帖子有各种各样的问题,但没有一个问题能为我提供解决方案.我有4个标签fragment activity,每个标签都有自己的标签fragment.我要进入另一个fragment里面.当我切换到标签时,它有时会重叠并且两者都可见.

这是代码(xml):

<Button
    android:id="@+id/checkBal"
    android:layout_width="fill_parent"
    android:layout_height="45dp"
    android:clickable="false"
    android:gravity="left|center_vertical"
    android:typeface="serif" />

<View
    android:layout_width="fill_parent"
    android:layout_height="2dp"
    android:layout_marginLeft="5dp"
    android:layout_marginRight="5dp"
    android:layout_marginTop="2dp"
    android:background="@color/green" />

<FrameLayout
    android:id="@+id/realtabcontent"
    android:layout_width="match_parent"
    android:layout_height="0dip"
    android:layout_weight="1" />

<android.support.v4.app.FragmentTabHost
    android:id="@android:id/tabhost"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <FrameLayout
        android:id="@android:id/tabcontent"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_weight="0" />
</android.support.v4.app.FragmentTabHost>

public class Tab_Activity extends FragmentActivity {

FragmentTabHost mHost;
Button balance;


@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.tabs);

    balance = (Button) findViewById(R.id.checkBal);
    mHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
    mHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);

    mHost.addTab(mHost.newTabSpec("Home").setIndicator("Home"), …